In today's chaotic world, it is hard to find a place where you can sit and enjoy peace and quiet. Noises from neighbours, traffic, railway lines, industrial units, loudspeakers, pubs and aircraft constantly intrude our lives and hamper the serenity we so desperately desire. Windows and doors are usually the weakest point of sound insulation in the home and the problem gets worse with traditional windows or doors which have gaps even when closed. The gaps - a result of flaws in design, construction or installation - allow easy passage for noise to just barge in and destroy the tranquillity of a home.